https://devzone.nordicsemi.com/f/nordic-q-a/79677/sending-notification-without-responseI am trying to send a lot of data and I am trying to do this with notification. As I understood notification do not need acknowledgment and should not use que for messages or? The problem I am facing is that it is actually waiting for acknowledgment fromen-USTelligent Community 13Thu, 16 Sep 2021 11:55:47 GMThttps://devzone.nordicsemi.com/thread/329819?ContentTypeID=1Thu, 16 Sep 2021 11:55:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:1029eb33-df45-4322-86d2-f23df0ea33b4Sigurd<p>Hi,</p> [quote user=""]As I understood notification do not need acknowledgment and should not use que for messages or?[/quote] <p>All packets transmitted over a BLE link will be acknowledged on the Link Layer level. This ensures that a re-transmission happens if a packet is lost. So <span>notifications&nbsp;</span>uses a queue as well.</p> <p>If you are having issues with&nbsp;<span>NRF_ERROR_RESOURCES, you could try to increase the value of&nbsp;NRF_SDH_BLE_GAP_EVENT_LENGTH in sdk_config.h</span></p><div style="clear:both;"></div>